[GPU/Vulkan] Maybe fix minimum mip level. Probably breaks everything.

src/xenia/gpu/texture_info.h

@@ -327,7 +327,8 @@ struct TextureInfo {
   uint32_t height;  // height in pixels
   uint32_t depth;   // depth in layers
   uint32_t pitch;   // pitch in blocks
-  uint32_t mip_levels;
+  uint32_t mip_min_level;
+  uint32_t mip_max_level;
   bool is_tiled;
   bool has_packed_mips;
 
@@ -342,6 +343,8 @@ struct TextureInfo {
     return format_info()->type == FormatType::kCompressed;
   }
 
+  uint32_t mip_levels() const { return 1 + (mip_max_level - mip_min_level); }
+
   static bool Prepare(const xenos::xe_gpu_texture_fetch_t& fetch,
                       TextureInfo* out_info);